Malicious PDF — malware analysis report

Static analysis result for SHA-256 833e26ea133efbdd…

MALICIOUS

PDF

51.1 KB Created: 2020-08-31 22:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96112633fe5dec467d5e961be2df9192 SHA-1: 8ae02f3d465d8db3934a2151bc106990a5a437c5 SHA-256: 833e26ea133efbdd5a37d0f20dd3a73f088bb5c7b0cb74fcaa49237217c544f2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=binding+energy+of+nucleus+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://static.usrfiles.com/ugd/4725f1_b34cec9c777447829e689097ac1027b5.pdf'. The document body, though heavily obfuscated, contains the same URL as the redirector, suggesting a social engineering lure to drive traffic to malicious infrastructure.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=binding+energy+of+nucleus+pdf
    • https://static.usrfiles.com/ugd/4725f1_b34cec9c777447829e689097ac1027b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_623b77815142466584cc69fe5b4dead3.pdf
    • https://static.usrfiles.com/ugd/b8c837_714e4135be8f4c96a179b8141231f395.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea145fc830984c73b15303f77353c4a6.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_6dd6ecbe5a964dc28a7203de9952e038.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/rebozuwedotasekosuwozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/84268012507.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/xifevekazog.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/39900806354.pdf
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/16469742711.pdf
    • https://static.usrfiles.com/ugd/1849a1_a5112168da794a6ea1e93a9916b1f6fe.pdf
    • https://static.usrfiles.com/ugd/078c79_e5a6938c5ebf4c9bae6542d5570aa642.pdf
    • https://static.usrfiles.com/ugd/b8c837_0de0acfaed08426681610793192e3183.pdf
    • https://static.usrfiles.com/ugd/b8c837_d76eba5b98cc400d9f5d9aae50758baa.pdf
    • https://static.usrfiles.com/ugd/b8c837_c025833d1d234c23969e4c6b46ed53dd.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008af0.bin
a8056e9f8524f8799b68b65f89fa62a2b1b97c44c39cb652cf0dbe3a0ee290de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF0 5264 bytes
font_01_sfnt_off00009d00.bin
24353152fb7a48f466845ff46d08f2bb0be5a813feca7d61400e10e759d05163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D00 10144 bytes

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